Product Overview
Replace a failed main board and restore automation control with the Pentair 520657 EasyTouch UOC Motherboard. This replacement motherboard is made for EasyTouch Pool & Spa (combo) automatic control systems and supports 8 auxiliary circuits/functions for controlling pool and spa equipment and features.
Ideal For
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Replacing a non-working or intermittent EasyTouch UOC motherboard
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Pool & spa combo systems that need 8 auxiliary/circuits control capability
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Service pros repairing EasyTouch automation panels
Key Features
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Genuine Pentair replacement part
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Part Number: 520657
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8 Auxiliary / 8-Function UOC motherboard for EasyTouch pool & spa systems
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Built for EasyTouch Pool & Spa automatic control systems
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Controls multiple equipment/features through auxiliary circuits (as configured in your system)
Benefits
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Restores automation control without replacing the entire panel/system
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Brings back control of pool/spa features tied to auxiliary circuits
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OEM fit for intended EasyTouch pool & spa combo applications
Compatibility
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Pentair EasyTouch Pool & Spa Combination Systems, 8 Aux/Circuits versions
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Not universal — confirm your EasyTouch model and existing board/part number before ordering
What’s Included
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(1) Pentair EasyTouch UOC Motherboard, 8 Auxiliary | 520657
Installation Notes
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Disconnect power before servicing automation equipment
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Recommended for qualified service professionals or experienced installers
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After replacement, verify wiring connections and auxiliary circuit configuration
Customer-Facing Q&A
Q: What does “8 Auxiliary” mean?
A: It means the board supports 8 auxiliary circuits/functions in compatible EasyTouch pool & spa systems.
Q: Is this for pool-only EasyTouch systems?
A: This version is commonly used in Pool & Spa combo EasyTouch configurations. Confirm your system type and part number before ordering.
Q: How do I confirm I need part 520657?
A: Match the part number on your existing board and confirm your EasyTouch system is the 8 Aux/Circuits pool & spa combo configuration.